drivers/regulator/max77686.c

   1 /*
   2  * max77686.c - Regulator driver for the Maxim 77686
   3  *
   4  * Copyright (C) 2012 Samsung Electronics
   5  * Chiwoong Byun <woong.byun@smasung.com>
   6  * Jonghwa Lee <jonghwa3.lee@samsung.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  *
  22  * This driver is based on max8997.c
  23  */
  24
  25 #include <linux/kernel.h>
  26 #include <linux/bug.h>
  27 #include <linux/delay.h>
  28 #include <linux/err.h>
  29 #include <linux/gpio.h>
  30 #include <linux/slab.h>
  31 #include <linux/platform_device.h>
  32 #include <linux/regulator/driver.h>
  33 #include <linux/regulator/machine.h>
  34 #include <linux/regulator/of_regulator.h>
  35 #include <linux/mfd/max77686.h>
  36 #include <linux/mfd/max77686-private.h>
  37
  38 #define MAX77686_LDO_MINUV      800000
  39 #define MAX77686_LDO_UVSTEP     50000
  40 #define MAX77686_LDO_LOW_MINUV  800000
  41 #define MAX77686_LDO_LOW_UVSTEP 25000
  42 #define MAX77686_BUCK_MINUV     750000
  43 #define MAX77686_BUCK_UVSTEP    50000
  44 #define MAX77686_RAMP_DELAY     100000                  /* uV/us */
  45 #define MAX77686_DVS_RAMP_DELAY 27500                   /* uV/us */
  46 #define MAX77686_DVS_MINUV      600000
  47 #define MAX77686_DVS_UVSTEP     12500
  48
  49 #define MAX77686_OPMODE_SHIFT   6
  50 #define MAX77686_OPMODE_BUCK234_SHIFT   4
  51 #define MAX77686_OPMODE_MASK    0x3
  52
  53 #define MAX77686_VSEL_MASK      0x3F
  54 #define MAX77686_DVS_VSEL_MASK  0xFF
  55
  56 #define MAX77686_RAMP_RATE_MASK 0xC0
  57
  58 #define MAX77686_REGULATORS     MAX77686_REG_MAX
  59 #define MAX77686_LDOS           26
  60
  61 enum max77686_ramp_rate {
  62         RAMP_RATE_13P75MV,
  63         RAMP_RATE_27P5MV,
  64         RAMP_RATE_55MV,
  65         RAMP_RATE_NO_CTRL,      /* 100mV/us */
  66 };
  67
  68 struct max77686_data {
  69         struct regulator_dev *rdev[MAX77686_REGULATORS];
  70         unsigned int opmode[MAX77686_REGULATORS];
  71 };
  72
  73 /* Some BUCKS supports Normal[ON/OFF] mode during suspend */
  74 static int max77686_buck_set_suspend_disable(struct regulator_dev *rdev)
  75 {
  76         unsigned int val;
  77         struct max77686_data *max77686 = rdev_get_drvdata(rdev);
  78         int ret, id = rdev_get_id(rdev);
  79
  80         if (id == MAX77686_BUCK1)
  81                 val = 0x1;
  82         else
  83                 val = 0x1 << MAX77686_OPMODE_BUCK234_SHIFT;
  84
  85         ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
  86                                  rdev->desc->enable_mask, val);
  87         if (ret)
  88                 return ret;
  89
  90         max77686->opmode[id] = val;
  91         return 0;
  92 }
  93
  94 /* Some LDOs supports [LPM/Normal]ON mode during suspend state */
  95 static int max77686_set_suspend_mode(struct regulator_dev *rdev,
  96                                      unsigned int mode)
  97 {
  98         struct max77686_data *max77686 = rdev_get_drvdata(rdev);
  99         unsigned int val;
 100         int ret, id = rdev_get_id(rdev);
 101
 102         /* BUCK[5-9] doesn't support this feature */
 103         if (id >= MAX77686_BUCK5)
 104                 return 0;
 105
 106         switch (mode) {
 107         case REGULATOR_MODE_IDLE:                       /* ON in LP Mode */
 108                 val = 0x2 << MAX77686_OPMODE_SHIFT;
 109                 break;
 110         case REGULATOR_MODE_NORMAL:                     /* ON in Normal Mode */
 111                 val = 0x3 << MAX77686_OPMODE_SHIFT;
 112                 break;
 113         default:
 114                 pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
 115                         rdev->desc->name, mode);
 116                 return -EINVAL;
 117         }
 118
 119         ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 120                                   rdev->desc->enable_mask, val);
 121         if (ret)
 122                 return ret;
 123
 124         max77686->opmode[id] = val;
 125         return 0;
 126 }
 127
 128 /* Some LDOs supports LPM-ON/OFF/Normal-ON mode during suspend state */
 129 static int max77686_ldo_set_suspend_mode(struct regulator_dev *rdev,
 130                                      unsigned int mode)
 131 {
 132         unsigned int val;
 133         struct max77686_data *max77686 = rdev_get_drvdata(rdev);
 134         int ret;
 135
 136         switch (mode) {
 137         case REGULATOR_MODE_STANDBY:                    /* switch off */
 138                 val = 0x1 << MAX77686_OPMODE_SHIFT;
 139                 break;
 140         case REGULATOR_MODE_IDLE:                       /* ON in LP Mode */
 141                 val = 0x2 << MAX77686_OPMODE_SHIFT;
 142                 break;
 143         case REGULATOR_MODE_NORMAL:                     /* ON in Normal Mode */
 144                 val = 0x3 << MAX77686_OPMODE_SHIFT;
 145                 break;
 146         default:
 147                 pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
 148                         rdev->desc->name, mode);
 149                 return -EINVAL;
 150         }
 151
 152         ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 153                                  rdev->desc->enable_mask, val);
 154         if (ret)
 155                 return ret;
 156
 157         max77686->opmode[rdev_get_id(rdev)] = val;
 158         return 0;
 159 }
 160
 161 static int max77686_enable(struct regulator_dev *rdev)
 162 {
 163         struct max77686_data *max77686 = rdev_get_drvdata(rdev);
 164
 165         return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 166                                   rdev->desc->enable_mask,
 167                                   max77686->opmode[rdev_get_id(rdev)]);
 168 }
 169
 170 static int max77686_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
 171 {
 172         unsigned int ramp_value = RAMP_RATE_NO_CTRL;
 173
 174         switch (ramp_delay) {
 175         case 1 ... 13750:
 176                 ramp_value = RAMP_RATE_13P75MV;
 177                 break;
 178         case 13751 ... 27500:
 179                 ramp_value = RAMP_RATE_27P5MV;
 180                 break;
 181         case 27501 ... 55000:
 182                 ramp_value = RAMP_RATE_55MV;
 183                 break;
 184         case 55001 ... 100000:
 185                 break;
 186         default:
 187                 pr_warn("%s: ramp_delay: %d not supported, setting 100000\n",
 188                         rdev->desc->name, ramp_delay);
 189         }
 190
 191         return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
 192                                   MAX77686_RAMP_RATE_MASK, ramp_value << 6);
 193 }
 194
 195 static struct regulator_ops max77686_ops = {
 196         .list_voltage           = regulator_list_voltage_linear,
 197         .map_voltage            = regulator_map_voltage_linear,
 198         .is_enabled             = regulator_is_enabled_regmap,
 199         .enable                 = max77686_enable,
 200         .disable                = regulator_disable_regmap,
 201         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 202         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 203         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 204         .set_suspend_mode       = max77686_set_suspend_mode,
 205 };
 206
 207 static struct regulator_ops max77686_ldo_ops = {
 208         .list_voltage           = regulator_list_voltage_linear,
 209         .map_voltage            = regulator_map_voltage_linear,
 210         .is_enabled             = regulator_is_enabled_regmap,
 211         .enable                 = max77686_enable,
 212         .disable                = regulator_disable_regmap,
 213         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 214         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 215         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 216         .set_suspend_mode       = max77686_ldo_set_suspend_mode,
 217 };
 218
 219 static struct regulator_ops max77686_buck1_ops = {
 220         .list_voltage           = regulator_list_voltage_linear,
 221         .map_voltage            = regulator_map_voltage_linear,
 222         .is_enabled             = regulator_is_enabled_regmap,
 223         .enable                 = max77686_enable,
 224         .disable                = regulator_disable_regmap,
 225         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 226         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 227         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 228         .set_suspend_disable    = max77686_buck_set_suspend_disable,
 229 };
 230
 231 static struct regulator_ops max77686_buck_dvs_ops = {
 232         .list_voltage           = regulator_list_voltage_linear,
 233         .map_voltage            = regulator_map_voltage_linear,
 234         .is_enabled             = regulator_is_enabled_regmap,
 235         .enable                 = max77686_enable,
 236         .disable                = regulator_disable_regmap,
 237         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 238         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 239         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 240         .set_ramp_delay         = max77686_set_ramp_delay,
 241         .set_suspend_disable    = max77686_buck_set_suspend_disable,
 242 };
 243
 244 #define regulator_desc_ldo(num)         {                               \
 245         .name           = "LDO"#num,                                    \
 246         .id             = MAX77686_LDO##num,                            \
 247         .ops            = &max77686_ops,                                \
 248         .type           = REGULATOR_VOLTAGE,                            \
 249         .owner          = THIS_MODULE,                                  \
 250         .min_uV         = MAX77686_LDO_MINUV,                           \
 251         .uV_step        = MAX77686_LDO_UVSTEP,                          \
 252         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
 253         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
 254         .vsel_reg       = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 255         .vsel_mask      = MAX77686_VSEL_MASK,                           \
 256         .enable_reg     = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 257         .enable_mask    = MAX77686_OPMODE_MASK                          \
 258                         << MAX77686_OPMODE_SHIFT,                       \
 259 }
 260 #define regulator_desc_lpm_ldo(num)     {                               \
 261         .name           = "LDO"#num,                                    \
 262         .id             = MAX77686_LDO##num,                            \
 263         .ops            = &max77686_ldo_ops,                            \
 264         .type           = REGULATOR_VOLTAGE,                            \
 265         .owner          = THIS_MODULE,                                  \
 266         .min_uV         = MAX77686_LDO_MINUV,                           \
 267         .uV_step        = MAX77686_LDO_UVSTEP,                          \
 268         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
 269         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
 270         .vsel_reg       = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 271         .vsel_mask      = MAX77686_VSEL_MASK,                           \
 272         .enable_reg     = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 273         .enable_mask    = MAX77686_OPMODE_MASK                          \
 274                         << MAX77686_OPMODE_SHIFT,                       \
 275 }
 276 #define regulator_desc_ldo_low(num)             {                       \
 277         .name           = "LDO"#num,                                    \
 278         .id             = MAX77686_LDO##num,                            \
 279         .ops            = &max77686_ldo_ops,                            \
 280         .type           = REGULATOR_VOLTAGE,                            \
 281         .owner          = THIS_MODULE,                                  \
 282         .min_uV         = MAX77686_LDO_LOW_MINUV,                       \
 283         .uV_step        = MAX77686_LDO_LOW_UVSTEP,                      \
 284         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
 285         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
 286         .vsel_reg       = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 287         .vsel_mask      = MAX77686_VSEL_MASK,                           \
 288         .enable_reg     = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 289         .enable_mask    = MAX77686_OPMODE_MASK                          \
 290                         << MAX77686_OPMODE_SHIFT,                       \
 291 }
 292 #define regulator_desc_ldo1_low(num)            {                       \
 293         .name           = "LDO"#num,                                    \
 294         .id             = MAX77686_LDO##num,                            \
 295         .ops            = &max77686_ops,                                \
 296         .type           = REGULATOR_VOLTAGE,                            \
 297         .owner          = THIS_MODULE,                                  \
 298         .min_uV         = MAX77686_LDO_LOW_MINUV,                       \
 299         .uV_step        = MAX77686_LDO_LOW_UVSTEP,                      \
 300         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
 301         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
 302         .vsel_reg       = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 303         .vsel_mask      = MAX77686_VSEL_MASK,                           \
 304         .enable_reg     = MAX77686_REG_LDO1CTRL1 + num - 1,             \
 305         .enable_mask    = MAX77686_OPMODE_MASK                          \
 306                         << MAX77686_OPMODE_SHIFT,                       \
 307 }
 308 #define regulator_desc_buck(num)                {                       \
 309         .name           = "BUCK"#num,                                   \
 310         .id             = MAX77686_BUCK##num,                           \
 311         .ops            = &max77686_ops,                                \
 312         .type           = REGULATOR_VOLTAGE,                            \
 313         .owner          = THIS_MODULE,                                  \
 314         .min_uV         = MAX77686_BUCK_MINUV,                          \
 315         .uV_step        = MAX77686_BUCK_UVSTEP,                         \
 316         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
 317         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
 318         .vsel_reg       = MAX77686_REG_BUCK5OUT + (num - 5) * 2,        \
 319         .vsel_mask      = MAX77686_VSEL_MASK,                           \
 320         .enable_reg     = MAX77686_REG_BUCK5CTRL + (num - 5) * 2,       \
 321         .enable_mask    = MAX77686_OPMODE_MASK,                         \
 322 }
 323 #define regulator_desc_buck1(num)               {                       \
 324         .name           = "BUCK"#num,                                   \
 325         .id             = MAX77686_BUCK##num,                           \
 326         .ops            = &max77686_buck1_ops,                          \
 327         .type           = REGULATOR_VOLTAGE,                            \
 328         .owner          = THIS_MODULE,                                  \
 329         .min_uV         = MAX77686_BUCK_MINUV,                          \
 330         .uV_step        = MAX77686_BUCK_UVSTEP,                         \
 331         .ramp_delay     = MAX77686_RAMP_DELAY,                          \
 332         .n_voltages     = MAX77686_VSEL_MASK + 1,                       \
 333         .vsel_reg       = MAX77686_REG_BUCK1OUT,                        \
 334         .vsel_mask      = MAX77686_VSEL_MASK,                           \
 335         .enable_reg     = MAX77686_REG_BUCK1CTRL,                       \
 336         .enable_mask    = MAX77686_OPMODE_MASK,                         \
 337 }
 338 #define regulator_desc_buck_dvs(num)            {                       \
 339         .name           = "BUCK"#num,                                   \
 340         .id             = MAX77686_BUCK##num,                           \
 341         .ops            = &max77686_buck_dvs_ops,                       \
 342         .type           = REGULATOR_VOLTAGE,                            \
 343         .owner          = THIS_MODULE,                                  \
 344         .min_uV         = MAX77686_DVS_MINUV,                           \
 345         .uV_step        = MAX77686_DVS_UVSTEP,                          \
 346         .ramp_delay     = MAX77686_DVS_RAMP_DELAY,                      \
 347         .n_voltages     = MAX77686_DVS_VSEL_MASK + 1,                   \
 348         .vsel_reg       = MAX77686_REG_BUCK2DVS1 + (num - 2) * 10,      \
 349         .vsel_mask      = MAX77686_DVS_VSEL_MASK,                       \
 350         .enable_reg     = MAX77686_REG_BUCK2CTRL1 + (num - 2) * 10,     \
 351         .enable_mask    = MAX77686_OPMODE_MASK                          \
 352                         << MAX77686_OPMODE_BUCK234_SHIFT,               \
 353 }
 354
 355 static struct regulator_desc regulators[] = {
 356         regulator_desc_ldo1_low(1),
 357         regulator_desc_ldo_low(2),
 358         regulator_desc_ldo(3),
 359         regulator_desc_ldo(4),
 360         regulator_desc_ldo(5),
 361         regulator_desc_ldo_low(6),
 362         regulator_desc_ldo_low(7),
 363         regulator_desc_ldo_low(8),
 364         regulator_desc_ldo(9),
 365         regulator_desc_lpm_ldo(10),
 366         regulator_desc_lpm_ldo(11),
 367         regulator_desc_lpm_ldo(12),
 368         regulator_desc_ldo(13),
 369         regulator_desc_lpm_ldo(14),
 370         regulator_desc_ldo_low(15),
 371         regulator_desc_lpm_ldo(16),
 372         regulator_desc_ldo(17),
 373         regulator_desc_ldo(18),
 374         regulator_desc_ldo(19),
 375         regulator_desc_ldo(20),
 376         regulator_desc_ldo(21),
 377         regulator_desc_ldo(22),
 378         regulator_desc_ldo(23),
 379         regulator_desc_ldo(24),
 380         regulator_desc_ldo(25),
 381         regulator_desc_ldo(26),
 382         regulator_desc_buck1(1),
 383         regulator_desc_buck_dvs(2),
 384         regulator_desc_buck_dvs(3),
 385         regulator_desc_buck_dvs(4),
 386         regulator_desc_buck(5),
 387         regulator_desc_buck(6),
 388         regulator_desc_buck(7),
 389         regulator_desc_buck(8),
 390         regulator_desc_buck(9),
 391 };
 392
 393 #ifdef CONFIG_OF
 394 static int max77686_pmic_dt_parse_pdata(struct platform_device *pdev,
 395                                         struct max77686_platform_data *pdata)
 396 {
 397         struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 398         struct device_node *pmic_np, *regulators_np;
 399         struct max77686_regulator_data *rdata;
 400         struct of_regulator_match rmatch;
 401         unsigned int i;
 402
 403         pmic_np = iodev->dev->of_node;
 404         regulators_np = of_find_node_by_name(pmic_np, "voltage-regulators");
 405         if (!regulators_np) {
 406                 dev_err(&pdev->dev, "could not find regulators sub-node\n");
 407                 return -EINVAL;
 408         }
 409
 410         pdata->num_regulators = ARRAY_SIZE(regulators);
 411         rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) *
 412                              pdata->num_regulators, GFP_KERNEL);
 413         if (!rdata) {
 414                 dev_err(&pdev->dev,
 415                         "could not allocate memory for regulator data\n");
 416                 return -ENOMEM;
 417         }
 418
 419         for (i = 0; i < pdata->num_regulators; i++) {
 420                 rmatch.name = regulators[i].name;
 421                 rmatch.init_data = NULL;
 422                 rmatch.of_node = NULL;
 423                 of_regulator_match(&pdev->dev, regulators_np, &rmatch, 1);
 424                 rdata[i].initdata = rmatch.init_data;
 425                 rdata[i].of_node = rmatch.of_node;
 426         }
 427
 428         pdata->regulators = rdata;
 429
 430         return 0;
 431 }
 432 #else
 433 static int max77686_pmic_dt_parse_pdata(struct platform_device *pdev,
 434                                         struct max77686_platform_data *pdata)
 435 {
 436         return 0;
 437 }
 438 #endif /* CONFIG_OF */
 439
 440 static int max77686_pmic_probe(struct platform_device *pdev)
 441 {
 442         struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 443         struct max77686_platform_data *pdata = dev_get_platdata(iodev->dev);
 444         struct max77686_data *max77686;
 445         int i, ret = 0;
 446         struct regulator_config config = { };
 447
 448         dev_dbg(&pdev->dev, "%s\n", __func__);
 449
 450         if (!pdata) {
 451                 dev_err(&pdev->dev, "no platform data found for regulator\n");
 452                 return -ENODEV;
 453         }
 454
 455         if (iodev->dev->of_node) {
 456                 ret = max77686_pmic_dt_parse_pdata(pdev, pdata);
 457                 if (ret)
 458                         return ret;
 459         }
 460
 461         if (pdata->num_regulators != MAX77686_REGULATORS) {
 462                 dev_err(&pdev->dev,
 463                         "Invalid initial data for regulator's initialiation\n");
 464                 return -EINVAL;
 465         }
 466
 467         max77686 = devm_kzalloc(&pdev->dev, sizeof(struct max77686_data),
 468                                 GFP_KERNEL);
 469         if (!max77686)
 470                 return -ENOMEM;
 471
 472         config.dev = &pdev->dev;
 473         config.regmap = iodev->regmap;
 474         config.driver_data = max77686;
 475         platform_set_drvdata(pdev, max77686);
 476
 477         for (i = 0; i < MAX77686_REGULATORS; i++) {
 478                 config.init_data = pdata->regulators[i].initdata;
 479                 config.of_node = pdata->regulators[i].of_node;
 480
 481                 max77686->opmode[i] = regulators[i].enable_mask;
 482                 max77686->rdev[i] = regulator_register(&regulators[i], &config);
 483                 if (IS_ERR(max77686->rdev[i])) {
 484                         ret = PTR_ERR(max77686->rdev[i]);
 485                         dev_err(&pdev->dev,
 486                                 "regulator init failed for %d\n", i);
 487                         max77686->rdev[i] = NULL;
 488                         goto err;
 489                 }
 490         }
 491
 492         return 0;
 493 err:
 494         while (--i >= 0)
 495                 regulator_unregister(max77686->rdev[i]);
 496         return ret;
 497 }
 498
 499 static int max77686_pmic_remove(struct platform_device *pdev)
 500 {
 501         struct max77686_data *max77686 = platform_get_drvdata(pdev);
 502         int i;
 503
 504         for (i = 0; i < MAX77686_REGULATORS; i++)
 505                 regulator_unregister(max77686->rdev[i]);
 506
 507         return 0;
 508 }
 509
 510 static const struct platform_device_id max77686_pmic_id[] = {
 511         {"max77686-pmic", 0},
 512         { },
 513 };
 514 MODULE_DEVICE_TABLE(platform, max77686_pmic_id);
 515
 516 static struct platform_driver max77686_pmic_driver = {
 517         .driver = {
 518                 .name = "max77686-pmic",
 519                 .owner = THIS_MODULE,
 520         },
 521         .probe = max77686_pmic_probe,
 522         .remove = max77686_pmic_remove,
 523         .id_table = max77686_pmic_id,
 524 };
 525
 526 static int __init max77686_pmic_init(void)
 527 {
 528         return platform_driver_register(&max77686_pmic_driver);
 529 }
 530 subsys_initcall(max77686_pmic_init);
 531
 532 static void __exit max77686_pmic_cleanup(void)
 533 {
 534         platform_driver_unregister(&max77686_pmic_driver);
 535 }
 536 module_exit(max77686_pmic_cleanup);
 537
 538 MODULE_DESCRIPTION("MAXIM 77686 Regulator Driver");
 539 MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
 540 MODULE_LICENSE("GPL");